ChatOpenAI初始化报错

[nuangnian]

from langchain_openai import ChatOpenAI

if name == "main":
config = {
"doc_path": "documents/", # 文档目录，放 markdown 文件
"emb_model": "models/bge-small-zh", # 本地 embedding 模型路径
"model_name": "qwen3-235b", # 本地模型别名，实际随服务端 alias
"url": "http://127.0.0.1:3001/v1", # OpenAI 格式接口地址
"api_key": "sk-debug" # 如果你是本地服务，随便写个 token
}

llm = ChatOpenAI(model=config.get("model_name") , base_url =config.get("url"), api_key=config.get("api_key"))

llm = ChatOpenAI(model=config.get("model_name") , base_url =config.get("url"), api_key=config.get("api_key"))
File "e:\Users\86187\anaconda3\envs\bailing\lib\site-packages\langchain_core\load\serializable.py", line 111, in init
super().init(*args, **kwargs)
File "e:\Users\86187\anaconda3\envs\bailing\lib\site-packages\pydantic\main.py", line 253, in init
validated_self = self.pydantic_validator.validate_python(data, self_instance=self)
File "e:\Users\86187\anaconda3\envs\bailing\lib\site-packages\pydantic_internal_mock_val_ser.py", line 100, in getattr
raise PydanticUserError(self._error_message, code=self._code)
pydantic.errors.PydanticUserError: ChatOpenAI is not fully defined; you should define BaseCache, then call ChatOpenAI.model_rebuild().

For further information visit https://errors.pydantic.dev/2.11/u/class-not-fully-defined

版本兼容问题？gpt回复
这个错误是由于 Pydantic 2.x 版本与当前的 langchain-openai 版本不兼容导致的。通过上述方法之一，应该能够解决这个问题。

[q629988171]

pip install pydantic==2.8.2